Age hardening is connected with________________?
Correct answer: D. Duralumin
- A. Babbitt metal
- B. Gun metal
- C. Stainless steel
- D. Duralumin
Explanation
Duralumin is an aluminium-copper alloy whose strength is increased by solution treatment, quenching and ageing, making it a classic age-hardening alloy. Babbitt and gun metal are not commonly associated with this treatment.
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